Citation

Ballard JL, McCoy PT. Transp. Res. Rec. 1983; 923: 54-57.

Copyright

(Copyright © 1983, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

One method of relieving excessive congestion on a two-way street that has a substantial number of midblock left turns is the construction of a two-way left-turn lane (TWLTL). Although the safety effectiveness of the TWLTL has been the subject of many studies, few studies have been made of its operational effectiveness. The objective of this study was to quantify the effects of a TWLTL on the efficiency of traffic flow on a two-way, four-lane street. By using computer simulation models specifically developed and validated for the purpose of this study, traffic operations were simulated over a range of traffic volumes and driveway densities. The reductions in stops and delays that result from a TWLTL were computed from the outputs of these simulation runs. Isograms of stops and delay reductions were prepared to facilitate the use of the results of this study to evaluate the potential cost-effectiveness of TWLTL installations.

Language: en

Keywords

ROADS AND STREETS; STREET TRAFFIC CONTROL - Computer Simulation